The first term of an AP is 10 and the last term is 28 If the sum of all terms is 190 what is the com...........

Quantitative Aptitude ( CCS) Arithmetic progression

The first term of an AP is 10 and the last term is 28. If the sum of all terms is 190, what is the common difference?

The sum of all terms is (n/2) (a + l) = 190.
This gives us n = 10.
The 10th term is (a + 9d) = 28.
Substituting for a, we get d = 2.

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